basic question on CFI flash and JEDEC flash

A basic question on flash memory. What's the difference between CFI and JEDEC flash?

I'm trying to add support of AMD Am29LV642D in MTD. After looking into MTD device drivers, I found three source files doing flash memory probe. They are cfi_probe.c, jedec_probe.c and jedec.c. The comments on jedec.c clearly descibe its usage. But I don't quite understand the other two files. Literally cfi_probe.c does cfi-compliant flash probe and jedec_probe.c does jedec flash probe. My confusion comes from that jedec_probe.c actually calls many cfi-related functions. So what should I do to support Am29LV642D?

BTW, I successfully added Intel I28F160F3T support, which is an JEDEC type flash (not sure about this, :(), by adding corresponding information into jedec_table[].

Thanks.

- Shawn.